Rotary slide rule interval indicator



Nov. 28, 1961 M. AUBERT ROTARY SLIDE RULE INTERVAL INDICATOR Filed Jan.28, 1960 FIG.3

INVENTOR. Marcel Aubert Ev -41 H Attorney 3,010,650 ROTARY SLIDE RULEINTERVAL INDICATOR Marcel Aubert, 1793 SW. th St, Miami; Fla.

Filed Jan. 28, 1960, Ser. No." 5,250

8 Claims. (Cl. 23588) This invention relatesto a rotary slide ruleinterval indicator for determining intervals of fecundity and 'ste- Idescribed that is readily adjustable for use byiwomen whose normalmenstrual cycles vary widely from the average 28 day cycle. Yet anotherobject is to provide an indicator which permits accurate determination,in advance, of'the' beginning date oi the riext' menstrual cycle.

Other objects, features and ad-va'ntages of the invention will beapparent from the following description when read with reference totheaccompanying drawings; In the drawings, wherein like reference numeralsdenote corresponding parts throughout the several views:

FIG. 1 is a plan view of arotary slide rule" indicator device embodyingthe invention; 7 r e FIG. 2 is a vertical cross-sectional view takenalong 0 the line 2-2 of FIG. 1' in the direction of the arrows,

' EIG.=3 is a plan view showing the two lowermost rotatable fiat membersin superposed position; as if separated along the line 33-' oflFIG. 2,and illustrates con structional details thereof, and v FIG. 4illustrates the index member separately,-in plan view.

Referring now in detail to the drawings, I'O'inFIG. 1 designates,generally, an improved rotaryslide rule interval indicator embodying theinvention, the same compris ing four fiat, superimposed membersyl-l,12', 16 and 14 held' in assembled relation by and mutually rotatableabout a central eyelet 15. The flat members 11, 12, 13 and 14 may be ofany thin, strong material, such as a good quality cardboard, or evenmetal, but preferably are made of sheet synthetic plastic fordurability, lightness, and attractiveness. I

The lowermost or base member. 1 1 preferably is of rectangular shape andof greater size than the upper. mem-. bers 12, 16 and 14, forconvenience in*holding=while.the members 12, 13 and 1-4.- are rotatablyadjusted withrespeot. thereto-and to each other in use; as hereinbelow'described. As illustrated in FIG. 3, the base member 11 is printed orotherwise marked on itsupper facewith a first arcuate series of numbersl16, extending clock-wise from 1 to 31, concentric with the centralpivotal open ing 17 of said fiat members and located in-segmental boxes18 of equal size. The base member 11 is also marked with a secondarcuate seriesof clockwise-extend ing numbers 3 to 31, indicated at =19,concentric also with the central pivotal opening 17, but at a lesserradius. The second arcuate series of numbers are so rotatively displacedwith respect to the first series 19 that the numbers 3 to 15 of saidsecond series are in radial alignment with the numbers 19 through 31 ofsaid first series, and the individual numbers of said second arcuateseries are located in segmental boxes 20 of equal size.

The second flat member 12 is generally circular in form and providedwith an ear or tab 21 facilitating rotary adjustment with respect to thebase member :11 for the purpose hereinbelow explained. The second fiatmember 12 is provided with a first arcuate opening 22 of such extent andat such a radius from the rotary axis as to expose United States Patent0 lice . 2 the first arcuate series of numbers 16 of the base member 11,and a second arcuate opening 23 of such extent and at such a' radiusfrom the rotary axis as to expose the secondarcuate series of numbers'19 when said first series are exposed (see FIG. 3). The second arcuateopening 23 is Wide enough to open into the'leadin'g edge of the firstarcuate openingx22 to provide an opening of increased width exposingboth arcuate series of numbers 16' and 19 where said openings overlap.Printed or otherwise impressed on the second fiat member 12 is anarcuate series ofnumbers 24 extending from the leading edge of thesecond arcuate opening 23' therein and coaxial with and in radialregister with the second series of numbers 19 of the base member 11. Thearcuate series of numbers 24. read clockwise from 1 to 30 and then, inconsecutive number pairs 1, 3 1; 2, 1; 3, 2 "4," 3'; (:51): 714; 6,:351W; 7, vn6; 8* n7; n9, 8; 110, "9" and 11", 10; said series of numbersand number p'airs'being' located in segmental boxes 25 equal in size tothe segmental boxes 20' of the second arcuate series of numbers 19 onthe base member 11.

The third flat member or index member 13 is sectorial in shape. andfor-med with a short arcuate opening 26 so radially spaced from thecenter of rotation as to expose eight consecutive numbers along thesecond arcuate series of numbers 19 on the base member 11, as seenthrough the' second arcuate opening '23 of the second fiat member 12 oralong the arcuate series of numbers 24 on the second flat member 12 or,along both said arcuate series wherethey join, depending upon theparticular setting of the device. The index. member 1 3- is providedwith an index line 27 extending" radially immune center of the outerperipheral edge of the arcuate opening 26, and an adjustment tab portion28 extending outwardly beyond the peripheral edgeof the second flatmember 12, tom

'cilitate rotational adjustment.

'I he fourth' or top an member 14 is circular in form and provided withan arcuate opening 29 concentric with Y the axis of rotation and about18 0 circular degrees in extent,.said' arcuate opening being of suchradial dispositioni as to permit exposure of the second arcuate seriesof members19 on the base member 11 and the arcuate series of numbers 24on the second hat member 12. Printed or'otherwise marked onthe face ofthe top flat member I 14 along the. outer peripheral edge of the arcuateopening 2 9 thereon, .is a series of index arrows 30 marked from 2.1'to3.7, consecutively, in the clockwise direction,

and arcuately spaced to the. same degree as the individual ber 14'approximately diametrically opposite the arcuate opening 29 therein is asubstantially rectangular opening 3 2' of: such sideandradia'liposition. as to expose one at a time only of the number boxes18oi" the first arcuate series of numbers 16 in the base member 11.

In use, the second flat member '12 will first be turned with respect tothe base member (1 1, by means of the tab or ear 21, so that the number'1 of the arcuate series of numbers 24 on the second fiat member 12,corresponding to the days of the new month, is next to the last day ofthe last menstruation month as indicated by the members 28, 29, 30 or 31 of the second series of arcuate numbers 19 on the first member 11. Inthe embodiment illustrated in FIG. 1 it will be seen that number 1 ofthe arcuate series 24 is set next to the number 3 0 (corresponding to athirty day previous month) of the series 19, by way of example. Thefourth or top member 114 will then be turned so that the opening 32therein is over the date of the beginning of the last menstruation (the18th day of the month as illustrated by way of example in FIG. 1). Theindex member 13 will then be moved so that its index line 27 is in linewith the index arrow 30 corresponding to the cycle of the user (thenumber of days between mens-truations). In FIG. 1, it will be seen thatthe index line 27 of the index member 13 is set, by way of example, fora 28 day cycle. The dates of fecundity can then be read within thearcuate opening 26 of the index member 13. The days of fecundity thusare the 27th, 28th, 29th and 30th of the month during which menstruationtakes place, and the 1st, 2nd, 3rd and 4th of the following or newmonth. If the cycle of the user varies, the days of fecundity can becomputed as from the first day of the shortest cycle to the last day ofthe longest cycle.

Means is also provided for indicating the beginning day of the nextmenstruation. To this end, thesector shaped index member 13 is providedwith a leading edge portion 33 which, when the computer is set ashereinabove described, marks the date of the beginning of the nextmenstruation on the arcuate series of numbers 24 on the second fiatmember 12 as seen through the arcuate opening 29 in the top that member14. Thus, as illustrated in the example of FIG. 1, this will be the 16thof th following or new month for the 28 day cycle.

While I have illustrated and described herein only one form in which theinvention can conveniently be embodied in practice, this embodiment ispresented by way of example only and not in a limiting sense. ,In short,the invention is limited only by the spirit and scope of the followingclaims.

What I claim as new and desire to secureby-Letters Patent is:

1. A rotary slide rule indicator comprising, in comfirst member and thefirst series of numbers of said second member, said fourth or top memberhaving an arcuate opening coaxial with said rotational axis and ofsubstantially 180 circular degrees in extent at such a radius as toexpose said short arcuate opening in said third fiat member, an openingin said fourth member sub stantially diametrically opposite said arcuateopening therein and at such'a radius with respect to said rotationalaxis and of such a size as to expose one at a time of the individualmembers of said first arcuate series of numbers of said first member,and numerical indicia on said fourth member for rotatively setting saidthird member with respect thereto at a number corresponding to a cyclicperiod.

2. A rotary slide rule indicator as defined in claim 1 wherein saidnumerical indicia comprises a first consecutive series of arcuatelyarranged numbers adjacent said arcuate opening in said fourth member andan index line extending radially centrally of said short arcuate openingof said third member, said short arcuate opening being of such length asto expose a whole number of a plurality of consecutive numbers of saidsecond series of numbers on said first fiat member or said series ofnumbers on said second fiat member, selectively.

bination, four fiat members arranged in face-to-face supermembers beingthe bottom member and having impressed thereon a first arcuatelyarranged consecutive series of members coaxial with said commonrotational axis, said first flat member having impressed thereon asecond arcuately arranged consecutive series of numbers coaxial withsaid common rotational axis and radially and arcuately displaced withrespect to said first arcuately arranged series of numbers, the secondof said flat members having first and second arcuate openings coaxialwith said common rotational axis, the arcuate extent and radialdisposition of said arcuate openings being such that, for a given rotaryposition of said second fiat member with respect to said first fiatmember, said first arcuate opening will expose said first arcuate seriesof numbers and said second arcuate opening will expose said secondseries of numbers, said second flat member having impressed thereon afirst arcuately arranged consecutive series of numbers coaxial with saidcommon rotational axis and beginning from one end of said second arcuateopening and at a radius equal to that of said second series of numbers,said third fiat member having a relatively short arcuate opening coaxialwith said common rotational axis and at the radius of said second seriesof numbers of said 3. A rotary slide rule indicator as defined in claim2 wherein said third fiat member is in the shape of a sector and has aleading edge portion which extends to and marks off an individual numberof said second series of numbers on said first flat member or anindividual number of said series of numbers on said second fiat member,selectively, said marked 01f number being in advance of the numbersexposed by said short arcuate opening by a predetermined amount of wholenumbers.

- 4. A rotary slide rule indicator as defined in claim 3 including asecond arcuately arranged series of numbers along, an arcuate edgeportion of said arcuate opening of said fourth member, corresponding tosaid first consecutive series of arcuately arranged numbers thereon andin advance thereof to such a degree and so spaced as to becorrespondingly indexed by the leading edge of said third member to thecyclic period number of said first arcuate series of numbers on saidfourth member to which said third member is set. l

5. A rotary slide rule indicator as defined in claim 2 wherein saidarcuately arranged consecutive series of numbers all increase in theclockwise direction along their respective fiat members.

6. A rotary slide rule indicator as defined in claim 5 wherein saidsecond flat member is generally circular in shape and provided with anintegral peripheral tab facilitating rotation thereof with respect tosaid first fiat member.

7. A rotary slide rule indicator as defined in claim 6 wherein saidfourth member is circular in shape and wherein said third fiat member isprovided with an integral tab extending outwardly of the periphery ofsaid fourth flat member for facilitating rotational adjustment thereofwith respect to said fourth fiat member.

8. A rotary slide rule indicator as defined in claim 7 wherein saidfirst fiat member is rectangular in shape and of greater size than ofsaid second, third and fourth flat members.

'No references cited.

